Supporting bracket



June 1957 H. F. CRANMER 2,794,263

SUPPORTING BRACKET Filed 001.. 13, 1954 2 Sheets-Sheet l YIIIIIIII/IIIIIN VEN TOR.

HIS AGENT June 4, 1957 CRANMER 2,794,263

SUPPORTING BRACKET Filed Oct. 15, 1954 2 Sheets-Sheet 2 262/ 26 k A N \lHIS AGENT United States Patct 2,794,263 SUPPORTING BRACKET Harry F.Cranmer, Churchville, N. Y. Application October 13,1954, Serial No.462,036

' i 4 Claims. c1. 33-207 This invention relatesjto supporting brackets,and it more particularly pertains to plumb bob supporting The plumb bobsupporting bracket provided by the present invention is preferably ofmagnetic material, having one leg of the bracket in the form of a yokeconnecting two permanent magnets to form a U-shaped magnetic structurefor attachment to a vertical steel frame from a vertical reference 1member or pier. The other leg of the bracket has measured notches forsuspension of a plumb bob at a selected spacing away froma've'rticalsteel reference plane to which the bracket may 'bemagnetically secured. Thus the. bracket is"self-'supporting and no aidis required in the use of the'plumb' bob;

An object of the present invention is to provide a quickly detachableplumb bob support bracket adapted to be detachably secured to verticalsteel members.

Another object of the present invention is to use one leg of a plumb bobsupporting bracket as a yoke magnetically connecting two permanentmagnets.

Another object of the present invention is to provide a magnetic plumbbob support bracket that is magnetically attachable in an upper cornerof a frame, but yet the leg of the bracket from which a plumb bob is tobe supported is spaced away from two vertical planes at right angles toeach other.

Other objects, purposes, and characteristic features of the presentinvention will be in part obvious from the appending drawings, and inpart pointed out as the description of the invention progresses.

In describing the invention in detail, reference is made to theaccompanying drawings in which like reference characters are used toidentify corresponding parts in the several views, and in which:

Fig. 1 is an elevational view in perspective of one embodiment of thepresent invention showing a magnetic plumb bob bracket magneticallysecured in the side of a vertical steel frame;

Fig. 2 is an elevational view in perspective of another embodiment ofthe present invention showing a plumb bob supporting bracket leg asbeing integral with a U- shaped supporting permanent magnet;

Fig. 3 is an elevational view in perspective of a slider for use on thebracket of Fig. 2; and,

Fig. 4 is an elevational view in perspective of another embodiment ofthe present invention showing a plumb bob support bracket requiring onlya single permanent magnet.

With reference to Fig. 1, the plumb bob supporting bracket comprises aright angle bracket B supported by 2,794,263 Patented June 4, 1957permaent magnets PM1 and PMZ. The bracket B has a horizontal leg 10 anda vertical leg 11.

The permanent magnets PM1 and PM2 are of equal size and substantiallycubical in shape. These magnets are spaced from each other and disposedone above the other as viewed in Fig. 1, the leg 11 of the bracket Bbeing suitably secured as by Welding across the backs of the permanentmagnets PM1 and PM2 to form a yoke of magnetic material connecting thetwo permanent magnets in series to form a U-shaped magnetic structure.The magnets PM1 and PMZ could, however, be detachably secured, as byspring clips, to the leg 11. The magnets PM1 and PM2 are shown as beingmagnetically attached to the side and back members 12 and 13respectively of a vertical steel frame or pier. It will be noted asillustrated that the bracket is supported both by magnetic attraction tothe side member 12 and the back member 13, but it is to be understoodthat the bracket will be adequately supported by either of these membersalone in the absence of the other as conditions may arise in practice.The magnets PM1 and PMZ are preferably poled for a series magneticcircuit by being magnetized with north and south poles in elevationalrelationship for the different magnets as is illustrated by the N and-Smarkings in the drawings.

The leg 10 has everal vertical notches 14 formed at regular intervalsalong the righthand side thereof, these notches 14 being preferablyspaced in even inches, or fractions thereof so that a plumb bob 15supported by a cord 16 is supported at aknown distance from the surface12.

The bracket B is made slightly narrower than the permanent magnetsPM1-and PM2, and is disposed slightly below the top of permanent magnetPM1, so that when in position as shown in Fig. 1, there is always spacearound theback and above theleg 10 to secure the plumb bob at the properheight after the bracket has been magnetically secured in position. Whenthe cord 16 is wound around the leg 10, it is secured as by the knot 17formed in the cord 16 and inserted into one of the slots 14. It will benoted that by the righthand side of the permanent magnets PM1 and PM2projecting beyond the bracket B, the same facility of providingclearance for wrapping the cord 16 around the leg 10 is provided for acondition where the supporting bracket is mounted in a correspondinglefthand corner, as compared to the righthand corner in which it isshown.

With reference to Fig. 2, another embodiment of the present invention isillustrated wherein a horizontal bracket leg 18 is formed as an integralpart of a U-shaped permanent magnet PM3. The bracket leg 18 is madeslightly narrower than the width of the permanent magnet PM3 for thesame reasons that have been given with reference to the embodiment ofthe invention shown in Fig. 1.

According to Fig. 2, the support of a plumb bob 19 is by a cord 20 thatis carried on the leg 18 by a sliding sleeve 21 that is slidablelongitudinally along the leg 18 so that the plumb bob 19 may be locatedat any desired spacing from the surface to which the supporting bracketis magnetically secured. The sleeve 21 may be formed of sheet metalfolded in a rectangular manner as is illustrated in Fig. 3. A suitableanchor 22 is provided in the top of the sleeve 21 for the cord 20. Athumb screw 23 is threaded into the leg 18 to retain the sleeve 21 onthe leg 18.

Another embodiment of the present invention is shown in Fig. 4 wherein abracket is constructed of U-shaped magnetic structure but requiring onlya single permanent magnet PM4. This permanent magnet is illustrated asbeing magnetically attracted in operating position to right anglevertical steel pier members 24 and 25 respectively.

As has been described with respect to the embodiment of the inventionshown in Fig. l, the magnet will hold when used in connection witheither of the pier members 24 or 25 in the absence of the other. Thepermanent magnet PM4 is magnetized to set up magnetic poles in generalas is indicated by N and S markings in-the drawing. I

A bracket B1 of a width preferably less than the width of the permanentmagnet PM4 is secured across theside of the permanent magnet PM4opposite from the pier member 24 by a vertical leg 26 being welded asshown, or otherwise suitably secured, to the permanent magnet PM4. Thisvertical leg 26 is ofiset so as to have vertical surfaces 26a and 26b inlaterally disposed vertical planes that are spaced apart by the width ofthe permanent magnet PM4. This provides a vertical surface of the legsection 261) that bears against the pier 24 to which the supportingbracket is shown as being magnetically attached.

The bracketBl has a horizontal leg 27 extending outwardly from the lowerend of the section-26b of the vertical leg 26. This leg 27 is notchedfor support of a plumb bob as described with respect to the leg ofbracket B shown in Fig. 1. Thus a plumb bob 28 is supported by a cord 29from the leg 27. Like the bracket B of Fig. l, the bracket B1 is ofmagnetic material so as to cooperate with the associated permanentmagnet to form a U-shaped magnetic structure so as to most efiectivelyadhere to any vertical steel member.

It will be noted that the structure as shown in Fig. 4 will support amaximum amount of weight for a single magnet because a force tending tobreak the magnet PM4 loose from the pier 24 acts around a pivot point atthe base of the bracket leg 26, and thus the permanent magnet PM4 hasmechanical advantage as compared to extending the horizontal bracket leg27 directly from the permanent magnet PM4.

Having thus described three embodiments of a plumb bob support bracket,it is to beunderstood that the prescut disclosure is given merely by wayof example, and that various modifications, adaptations and alterationsmay be made to the specific forms shown without departing from thespirit and scope of the present invention except as limited by theappended claims.

What I claim is:

1. A plumb bob support for magnetic attachment to a steel piercomprising, a permanent bar magnet having a pole face for magneticattachment to a vertical steel pier, and a bracket of magnetic materialhaving two legs, one end of one of said legs being secured to saidpermanent magnet, and the other end of said one leg being formed with apole face in the same plane as said pole face of the permanent magnet,the other of said legs of said bracket extending outwardly at rightangles from said pole face of said one leg, and the other of said legshaving notches formed therein for receiving a plumb bob cord.

2. A plumb bob support according to claim 1 wherein the permanent magnetextends laterally from the bracket to space the bracket laterally awayfrom any object to which the permanent magnet may be attracted.

3. A plumb bob support according to claim 1 wherein the permanent magnetextends elevationally from the bracket to space the bracketelevationally away from any horizontal object to the underside of whichthe permanent magnet may be attracted.

4. A plumb bob support according to claim 1 wherein the permanent magnetoverlaps the bracket on two adjoining sides to space the bracketlaterally and elevationally away from a corner in which the permanentmagnet may be disposed when it is attracted to an inside corner of asteel pier.

References Cited in the file of this patent UNITED STATES PATENTS1,405,221 Jenkins Jan. 31, 1922 2,337,248 Koller Dec. 21, 1943 2,343,688Maxey Mar. 7, 1944 2,553,668 Marello May 22, 1951

